Automatic heat machine



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A. J. JOHNSON AUTOMATIC HEAT MACHINE Filed Dec. 29, 1953 2 Shets-Sheet 2 .l 7 7 n L |ll||:\ Y. V l.. f

AINVENTOR /lwz .I .l0/11150.

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Patented May 5, 1936 PATENT OFFICE AUTOMATIC HEAT MACHINE Allen J. Johnson, Delaware County, Pa., assigner,

by mesne assignments, to Anthracite Heat Appliance Corporation, Dover, Del., a corporation of Delaware Application December 29, 1938, Serial No. 704,486

1 Claim. (Cl.11045) lThis invention relates in general to heating devices and more particularly to an automatic furnace which will be suitable for supplying heat in the form of steam, hot water, or other hot liquid, through a heating plant.

One of the objects of this invention is to provide a completely automatic heating machine which will automatically convey coal from the bin and convey the ashes to a remote point, and to arrange such conveying devices so that the 'conveying of the coal and the removal of the ashes will be operations which may be independent of each other.

Another object is to provide a heating device which will consist of very few moving parts which will be fully enclosed and provided with the minimum adjustments or necessity for same.

Another objectis to provide an improved and eiiicient system of zoning the air so as to permit a iine adjustment of the fuel to the conditions present so as to insure an efficient combustion.

With the foregoing and other objects in view, the invention consists in the combination of parts and in the details of construction hereinafter set forth in the following specification and appended claim, certain embodiments thereof being illustrated in the accompanying drawings, in which:

Figure 1 is a view in cross-section taken through the lower `portion of the heating device showing the tuyre pot in section;

Figure 2 is a view in section taken along line 2--2 of Figure 1;

Figure 3 is a viewin section taken along line 3 3 of Figure 1;

Figure 4 is a view in section taken along line 4-4 of Figure 3;

Figure 5 is a view in section taken along line 5-5 of Figure 3;

Figure 6 is a diagrammatical showing of the coal and ash conveyor;

Figure 7 is an enlarged sectional detail view of the ash conveyor shown in Figure 3.

Referring more particularly to the drawings., the heating device consists in a main outer casing I with an inner wall 2 between which walls there may be provided suitable heating insulation material 3. The coal, or other fuel, is conveyed through an aperture 44 into a. conveyor 5, which is provided with a spiral screw 6 which, `when rotated carries a certain amount of coal into a position for combustion immediately below the tuyre pot- 1. This fuel conveying spiral member i is carried by a shaft 8 which in turn carries a ratchet wheel 9. As the shaft III, driven by a suitable electrical motor II, is operated, rotary motion is imparted to a crank I2 and thence to a crank I3 so as to intermittently bring a pawl I4 into engagement with ratchet wheel 9 so as to impart the necessary and predetermined rotary motion to the shaft 8. Such a rotary motion to shaft 8 will cause a certain number of turns of the spiral conveying member and thus bring a predetermined amount of fresh fuel supply into position below the tuyre pot for combustion purposes. The link I3 is pivotally connected at 55 to a link 56 carried loosely by. shaft 8 so as to allow for necessary flexibility of operation.,

The spiral conveying screw 6 is preferably formedv with a reverse screw portion 6 so that if there is any tendency for thefuel to be carried past the central lower opening l of the tuyre pot, the reverse threads return and refeed suchfuel as Well as such fuel or siftings which may have dropped down from the tuyre pot back to the furnace in the proper position below the tuyre pot.

The motor II also drives a blower I6 through the medium of a shaft I1. As shown in Figure 4, a passageway I8 is provided in the casing for the air forced through it by the blower. This passageway as it nears the tuyre pot is subdivided into three passageways I8a, I8b and I8c, which communicate respectively with compartments 1a, 1b and le, circularly and concentrically arranged with respect to the tuyre pot- The tuyre D012 iS provided with a large number ofapertures I9 throughout its funnel-shapedy sidewalls, there being a number of such apertures in the sidewalls adjacent each of the compartments 1a, 1b and 1c. 'Ihis is for the purpose of aiding the combustion and the intensity thereof. Any suitable regulating means may be employed for selectively openthere is provided a device whereby the fuel may be brought from a remote point in a series of rings attached to a cable and by the use of the same device the burned ashes maybe removed from the furnace and dumped at apoint remote. In order to make this possible, there may be provided a l This An endless belt, cable or belt, cable or chain is carried to a point remote from the furnace where it is stretched about a drum 21 driven independently of the motor` I6v and the screw 6. The tuyre pot remains stationary but the remotely driven cable and rings by engaging the projections 2| of the idler frame 20 rotates the latter. The projections 2| in their rotation with the frame 20 act as scrapers for scraping the ashes in the ash pit as they fall over the top of the stationary tuyre pot. The scrapers 2| scrape the ashes from the point of exit of the rings 30 into the extension 25 to the point of entrance of the rings into the ash pit from the extension 26 at which point the rings by reason of their relative size as compared to the scrapers 2| perform the function of carrying the ashes around the greater portion of the ash pit and thence out through the pipe 25 to a remote ash receiver 24' into which the ashes are dumped.

The tuyre pot casting is extended at 25 and 26 to receive pipes 28 and 29. The endless belt, cable or chain 22 may carry a series of rings 30 for collecting, fuel from a remote coal feeding station 24 and bringing it in through pipe 29 from which it is dumped out through the hole 29' into the funnel 4 of pipe 5 containing the coal feed worm 6. 'Ihe rings 30 asthey continue their travel pick up the ashes about the tuyre pot and carry them out of the furnace through pipe 28 in which there may be a discharge opening similar to 29 at a remote point for dumping the ashes into the ash receiver 24. The worm 6 if desired may be extended past the end of pipe 5 directly into a remote coal feeding station 24, and instead of having the cable 22 and rings 30 handle both the coal and ash in which case the worm will bring the coal in direct from the coal feeding station and the cable and rings Will remove the ash. The travel of the rings continues from Ythe point at which the ashes are dumped into the remote ash receiver 24' until it engages coal fed into the pipe which it carries forward to be dumped into the funnel4.

The motor, as previously described, is adapted to intermittently drive the shaft 8 and this is brought about in such a manner that upon each revolution of the motor shaft l0 the pawl I4 advances the ratchet wheel 9 the distance of one tooth, causing an oscillation of shaft 8 throughout a corresponding arc of movement, as shown in Figure 5.

I claim:

In combination with a furnace for burning solid fuel, a stationary tuyre pot, a Stoker including a conduit with an inlet exterior of the furnace, an outlet adjacent said pot and a motor driven stoking mechanism Within said conduit for feeding said fuel from said inlet to said pot, an ash pit arranged circumferentially of said pot and a ring rotatably mounted in said ash pit to collect the ash as it falls over Vthe sides of said pot, said ring having circumferentially spaced projections thereon, a motor driven endless belt extending partially about the circumference of said ring,

, inlet and outlet conduits for enclosing said endless belt, said belt being provided with spaced members for engaging the projections on said ring to rotate the latter and to force the accumulated ash into the outlet conduit and through an outlet therein to a remote point for dumping, said belt and its spaced members being adapted on their return movement to feed fuel let in at a'remote point into the inlet conduit and out thereof into the inlet of the conduit enclosing said stoking mechanism, said endless belt and said stoking mechanism being driven independently of each other.

, ALLEN J. JOHNSON. 

